Brugières P, Castrec-Carpo A, Héran F, Goujon C, Gaston A, Marsault C
J Neuroradiol. 1989;16(1):1-10.
Five patients with recent spontaneous or post-traumatic dissection of the internal carotid artery (ICA) were explored by magnetic resonance imaging (MRI), using T1-weighted axial sections in all cases. In four patients examined during the subacute phase (after 7 days) the diagnosis of ICA dissection was strongly suspected on the association of a very high intensity signal produced by the parietal haematoma with a contiguous signal void area corresponding to the lumen of the ICA. A control MRI examination performed in two patients 2 months after the onset of dissection showed that it had regressed and that the carotid arteries were patent, which was confirmed by angiography. In the fifth patient MRI provided evidence for the evolution of a post-traumatic dissection towards thrombosis. The MRI image of carotid dissection at the subacute phase seems to be characteristic. MRI is also useful to follow up dissections under treatment and to postpone angiography. The latter, however, remains necessary to investigate for associated arterial dysplasia and to evaluate the sequelae of dissection.
对5例近期发生自发性或创伤后颈内动脉（ICA）夹层的患者进行了磁共振成像（MRI）检查，所有病例均采用T1加权轴向切片。在4例亚急性期（7天后）接受检查的患者中，由于顶叶血肿产生的极高强度信号与对应于ICA管腔的连续信号缺失区域相关联，强烈怀疑存在ICA夹层。在夹层发作2个月后对2例患者进行的对照MRI检查显示夹层已消退且颈动脉通畅，血管造影证实了这一点。在第5例患者中，MRI为创伤后夹层向血栓形成的演变提供了证据。亚急性期颈动脉夹层的MRI图像似乎具有特征性。MRI对于随访治疗中的夹层以及推迟血管造影也很有用。然而，血管造影对于检查相关动脉发育异常和评估夹层后遗症仍然是必要的。
